So yes all planets have one noon, a cold planet will be cold everytwhere, a desert planet will be desert everywhere

There are kind of sub biomes when it comes to terrain. For the most part planets will be a hilly type of terrain, but sometimes there will be spots where there are plateaus or cubes or donuts of terrain. The most extreme example I’ve had is the standard hills biome then I fly to a different spot of the planet with my pulse engine and it’s these extreme hills

Edit: forgot to add dead planets are the only one with a gravity difference